Titus 3:8-9

Revival: For and Against

That being justified by his grace, we should be made heirs according to the hope of eternal life.

This is a faithful saying, and these things I will that thou affirm constantly, that they which have believed in God might be careful to maintain good works. These things are good and profitable unto men. But avoid foolish questions, and genealogies, and contentions, and strivings about the law; for they are unprofitable and vain. (Titus 3:7, 8-9)

Paul gives a resounding affirmation on preaching justification by grace and the inheritance of the hope of eternal life. The preacher is to continually affirm these things. The result of such preaching will be increased love in action in the church. Revival. This is what we need.
What we don't need is study for its own sake. Questions that do not have a practical answer, historical research that does not make a spiritual difference, debates, and trying to set rules that everyone needs to follow all work against revival.